2pcs Professional Football Referee Intercom full duplex 1200M Referees headset Wireless BT Intercom Interphone This headset is specially designed for referees of football and handball.Referees wear a single ear headset to get the real time news of the game, this headset support them to run freely but also hear a clear sound even the surrounding is noisy.This kit includes referee headset and V6 intercom, the headset works with the intercom very well. Referees can hear the sound clearly even the surrouding is noisy, V6 helps referee to talk in 1200m range, perect for a football field.Features:Between 2 referees talking on the fieldMax talking range: 1200m/3937feet between 2 refereesMax working speed: Up to 120Km/hTalking time: Up to 8 hoursStandby time: 100 hoursFrequency: 2.4GHzBluetooth Core: Bluetooth 3.0Battery: 550 mAh Li Polymer batteryCharging time: About 3 hoursChip brand: CSRPower supply: AC 110V~240V Power output: DC 5V 55~75mAHighlights:BluetoothMotorcycle helmetintercom withtalking range up to1200 metersFull Duplex Wireless Bluetooth Handsintercom commnunicateUp to Pair 6 Riders&Talk Between Any 2 of them at a timeWithWind noise DSP cancellation,you could hear clearly at a speedup to 120km/hHigh quality batteries,3 hours charge to full andUp to 8hours talking timeWithStereo Bluetooth Headset,supportsstereo music/Audio navigation from GPS,Auto answerthecall.Ultrasonic integral molding,Better water resistance,could be used inall weather.Hands communication.you can pair with other 5 persons.Suit for motorcycle helmet (Full-face / Half-face)Works good with referee headset for football match(3-4pcs to make a referee group)Package included:2 x 2 x Referee headset2 x Armband bag2 x USB cable1 x User manualPackage Includes:Package Includes:2 x V6 Plus 2 x Referee headset2 x Armband bag2 x USB cable1 x User manual" Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.